Weak exciton scattering in molecular nanotubes revealed by double-quantum two-dimensional electronic spectroscopy.

نویسندگان

  • Darius Abramavicius
  • Alexandra Nemeth
  • Franz Milota
  • Jaroslaw Sperling
  • Shaul Mukamel
  • Harald F Kauffmann
چکیده

The two-exciton manifold of a double-wall cylindrical molecular aggregate is studied using a coherent third order optical technique. Experiments reveal the anharmonic character of the exciton bands. Atomistic simulations of the exciton-exciton scattering show that the excitons can be treated as weakly coupled hard-core bosons. The weak coupling stems from the extended exciton delocalization made possible by the nanotube geometry.

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عنوان ژورنال:
  • Physical review letters

دوره 108 6  شماره 

صفحات  -

تاریخ انتشار 2012